阴离子/阴离子多 (p-烯氧化物) 膜:从工业废水中回收的制备和电透析性能
Fabrício Wilbert1, Joana Farias Corte1, Felipe Tiago do Nascimento1
1Laboratório Aquário, Novo Hamburgo, Feevale University, Novo Hamburgo 93525-075, Brazil.
Membranes
|December 27, 2024
概括
研究人员开发了新的离子选择性膜,用聚二甲-1,4-氧化物 (PPO) 来进行电透析 (ED). 这些基于PPO的膜显示了高效的回收和化过程中的废水处理的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 电透析 (ED) 从化废水中提供回收和非矿物化水.
- 对于ED的商业离子选择性膜是有限的,阻碍了更广泛的采用.
- 开发新的,具有成本效益的膜对于ED扩张至关重要.
研究的目的:
- 开发使用聚二甲-1,4-氧化物 (PPO) 的新型均的阴离子和阴离子离子选择性膜.
- 为了优化基于PPO的阴离子和阴离子膜的合成条件.
- 为了评估这些膜在电透析应用中的性能.
主要方法:
- 通过PPO在不同摩尔比率和反应时间下通过硫化合成的阴离子膜.
- 通过PPO的化和随后的氨化制备的阳离子膜.
- 膜特性包括离子交换能力,导电性,热稳定性和表面形态分析.
主要成果:
- 对于阴离子膜的最佳硫化: 1:4.4 PPO:H2SO4摩尔比率,0.5小时反应时间.
- 阳离子膜的最佳合成: 1:0.5 PPO:NBS 状比率与14天的氨化.
- 实现了高提取率:91.8%的化物,90.9%的硫酸盐和85.5%的离子.
结论:
- 聚2,6-二甲基-1,4-氧化物 (PPO) 是一种可行的聚合物,用于创建有效的阴离子和阴离子离子选择性膜.
- 基于PPO的优化膜显示出电透析应用的巨大潜力,特别是在金属回收和水处理方面.
- 开发的膜有助于克服ED技术的局限性,为现有的商业选择提供了一个有前途的替代方案.
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